/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdc.versioning.dao.types;

import com.datastax.driver.mapping.annotations.Transient;
import com.datastax.driver.mapping.annotations.UDT;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

import java.util.Date;
import java.util.Map;

@UDT(name = "version", keyspace = "dox")
@Getter
@Setter
@NoArgsConstructor
public class Version {
  public static final String VERSION_STRING_VIOLATION_MSG =
      "Version string must be in the format of: {integer}.{integer}";

  @Transient
  private String id;
  private int major; // TODO: 6/7/2017 remove!
  private int minor; // TODO: 6/7/2017 remove!
  @Transient
  private String name;
  @Transient
  private String description;
  @Transient
  private String baseId;
  @Transient
  private Date creationTime;
  @Transient
  private Date modificationTime;
  @Transient
  private VersionStatus status = VersionStatus.Draft;
  @Transient
  private VersionState state;
  @Transient
  private Map<String, Object> additionalInfo;

  public Version(String id) {
    this.id = id;
  }

  @Deprecated
  public Version(int major, int minor) {
    this.major = major;
    this.minor = minor;
  }

  /**
   * Value of version.
   *
   * @param versionString the version string
   * @return the version
   */
  public static Version valueOf(String versionString) {
    if (versionString == null) {
      return null;
    }
    String[] versionLevels = versionString.split("\\.");
    Version version;
    if (versionLevels.length != 2) {
      throw new IllegalArgumentException(VERSION_STRING_VIOLATION_MSG);
    }
    try {
      version = new Version(Integer.parseInt(versionLevels[0]), Integer.parseInt(versionLevels[1]));
    } catch (Exception ex) {
      throw new IllegalArgumentException(VERSION_STRING_VIOLATION_MSG);
    }

    return version;
  }
  public Version calculateNextCandidate() {
    return new Version(major, minor + 1);
  }

  public Version calculateNextFinal() {
    return new Version(major + 1, 0);
  }

  @Transient
  public boolean isFinal() {
    return major != 0 && minor == 0;
  }

  @Override
  public int hashCode() {
    int result = major;
    result = 31 * result + minor;
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null || getClass() != obj.getClass()) {
      return false;
    }

    Version version = (Version) obj;
    return major == version.major && minor == version.minor;
  }

  public int compareTo(Version other){
    if (this.major>other.major) {
      return 1;
    } else if(this.major<other.major){
      return -1;
    } else if(this.major == other.major){
      return Integer.compare(this.minor,other.minor);
    }
    return 0;
  }

  @Override
  public String toString() {
    return name != null ? name : major + "." + minor;
  }

  @Override
  public Version clone() {
    Version version = new Version();
    version.setStatus(this.getStatus());
    version.setCreationTime(this.getCreationTime());
    version.setName(this.getName());
    version.setBaseId(this.getBaseId());
    version.setMajor(this.major);
    version.setMinor(this.minor);
    version.setModificationTime(this.getModificationTime());
    version.setDescription(this.description);
    version.setId(this.getId());
    return version;
  }
}